package com.taylor.community.controller;

import com.taylor.community.entity.DiscussPost;
import com.taylor.community.entity.Page;
import com.taylor.community.entity.User;
import com.taylor.community.service.DiscussPostService;
import com.taylor.community.service.LikeService;
import com.taylor.community.service.UserService;
import com.taylor.community.util.CommunityConstant;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Controller
public class HomeController implements CommunityConstant {

    @Autowired
    private DiscussPostService discussPostService;
    @Autowired
    private UserService userService;
    @Autowired
    private LikeService likeService;

    /**
     * 将访问 "/"转发到 "/index"
     * @return
     */
    @RequestMapping(path = "/",method = RequestMethod.GET)
    public String root(){
        return  "forward:/index";
    }
    @RequestMapping(path = "/index",method = RequestMethod.GET)
    /**
     * 方法调用前 SpringMVC会自动实例化Model和Page,并将Page注入到Model中，故在Thymeleaf中可以直接访问Page对象中的数据
     */
    public String getIndexPage(Model model, Page page,@RequestParam(name = "orderMode" , defaultValue = "0") int orderMode){
        page.setRows(discussPostService.findDiscussPostRows(0));
        page.setPath("/index/?orderMode="+orderMode);
        List<DiscussPost> list = discussPostService.findDiscussPosts(0,page.getOffset(),page.getLimit(),orderMode);
        List<Map<String ,Object>> discussPosts = new ArrayList<>();
        if(list != null){
            for (DiscussPost post : list){
                Map<String ,Object> map = new HashMap<>();
                map.put("post",post);
                User user = userService.findUserById(post.getUserId());
                map.put("user",user);
                long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST,post.getId());
                map.put("likeCount",likeCount);
                discussPosts.add(map);
            }
        }
        model.addAttribute("discussPosts",discussPosts);
        model.addAttribute("orderMode",orderMode);
        return "/index";
    }
    @RequestMapping(path = "/error",method = RequestMethod.GET)
    public String getErrorPage(){
        return "/error/500";
    }
    //用户类型权限不足时的请求并跳转404页面
    @RequestMapping(path = "/denied",method = RequestMethod.GET)
    public String getDeniedPage(){
        return "/error/404";
    }
}
